ESS insider ownership: who sold, why, and what they still hold

Who	Shares	Price	% of total stake	Total stake after	Trade date	Filed
Mary Kasaris Director	600	$279.45	17%	2.8K	May 27, 2026	May 29, 2026

What stands out

Mary Kasaris sold 600 shares (21% of starting holdings), but 633 more vested, so the stake grew (from 2.8K to 2.8K).Largest sale, May 27, 2026

Tax withholding outweighed market sales: the company withheld $5.7M of officers' and directors' shares for taxes, against $168K sold on the open market. The largest was Angela Kleiman ($3.4M withheld).Largest withholding, Dec 12, 2025

Percentages cover 12 of 13 officers and directors. Left out: George Marcus (most holdings were last confirmed in 2019). Disclosed company stock is not an insider's whole wealth.

Who sold, and how much of their stake

Officers and directors, past 12 months. Each bar is the insider's vested stake at the start of the period (Oct 8, 2025). The gold part is what they sold.

SoldRest of starting stakeAdded during the period

Mary Kasaris

Director

21% · $168KNo plan disclosed

Amounts, filings and trading plans for each seller

Selling by month

Officers and directors, Oct 2025 to Oct 2026. Each sale is counted once: under a disclosed plan, else to cover taxes, else no plan disclosed.

Disclosed planTo cover taxesNo plan disclosed

Common questions

Is the Essex Property Trust CEO selling stock?

No. Angela Kleiman reported no open-market sales in the past 12 months.

Why are Essex Property Trust insiders selling?

Filings rarely give a reason, and we don't guess at one. What they show is how the sales were made: 0% of sales by value ran under 10b5-1 trading plans disclosed in the filings and 100% had no disclosed plan. A trading plan schedules sales in advance.

Are any Essex Property Trust insiders buying?

No. Officers and directors reported no purchases in the past 12 months.

How much of their stake did Essex Property Trust insiders sell?

About 0.7% overall. As a group they ended with more shares than they started with. The biggest individual seller, Mary Kasaris, sold shares equal to 21% of starting holdings, but more vested, so the stake grew. These figures leave out George Marcus, the largest holder (most holdings were last confirmed in 2019). That covers the 12 months to Oct 8, 2026 and counts vested shares reported on SEC Forms 3, 4 and 5, which is not an insider's whole wealth.

The evidence

Who sold1 officer or director: amount, % of holdings, trading plan

Who sold	Amount	% of holdings	Trading plan
Mary Kasaris Director	$168K 600 shares	21%	No plan disclosed

The full ownership picture13 of 13 insiders fully reconciled · 13 officers and directors

Vested shares across all share classes, held directly and through trusts, LLCs and family members, as reported on SEC Forms 3, 4 and 5. Unvested awards and options are never counted as owned shares.

Insider

Held Oct 8, 2025

Sold

Held Oct 8, 2026

Still held

George Marcus

Most of this insider's holdings were last confirmed in 2019. Confirmed in the last three years: 382,042 shares. Not confirmed since: 1,499,247 shares, left out of this row. "Still held" is not shown because it would cover only the smaller, confirmed part.

Director

381K

382K

see note

Vesting, gifts, unvested awards and holding lines for George Marcus

0shares vested or exercised

0gifted (net of own trusts)

none reportedunvested awards, start → end

Includes unvested RSUs, amount not disclosed.
Additional holdings last reported more than 3 years ago are shown separately and excluded from totals.

Held through	Share class	Oct 8, 2025	Oct 8, 2026
Direct includes unvested RSUs, amount not disclosed	Common Stock	221,925	223,042
Marcus & Millichap Inc. and affiliates	Common Stock	155,000	155,000
family	Common Stock	4,000	4,000

Additional holdings last reported Oct 16, 2019, not confirmed since: 1,499,247 shares. Not included in any total or percentage on this page.

Direct, Common Stock - Restricted Shares: 315,638 shares, last reported Sep 10, 2013
SAC Redwood City Venture, LLC, DownREIT Limited Partnership Units: 234,306 shares, last reported Jun 14, 2019
MMC Investments, LLC, DownREIT Limited Partnership Units: 66,575 shares, last reported Oct 16, 2019
Direct, Partnership Units: 7,006 shares, last reported Sep 20, 2007
Direct, Units: 875,722 shares, last reported May 18, 2010

Angela Kleiman

Includes unvested RSUs, amount not disclosed.

President and CEO

25K

33K

no sales

Vesting, gifts, unvested awards and holding lines for Angela Kleiman

0shares vested or exercised

−2.5Kgifted (net of own trusts)

−13Kwithheld by the company for taxes

none reportedunvested awards, start → end

Includes unvested RSUs, amount not disclosed.

Held through	Share class	Oct 8, 2025	Oct 8, 2026
Direct includes unvested RSUs, amount not disclosed	Common Stock	13,662	21,972
Direct	Operating Partnership Units	11,331	11,331

Stock options (not counted as shares):

Options held	Strike price	Expires	Intrinsic value (estimate)
10,831	$214.79	Dec 8, 2031	$700K

Estimate: options held × ($279.45 − strike price), using the most recent insider trade price on Form 4 (May 27, 2026), not a market close.

Keith Guericke

Includes unvested RSUs, amount not disclosed. Additional holdings last reported more than 3 years ago are shown separately and excluded from totals.

Director

17K

no sales

Vesting, gifts, unvested awards and holding lines for Keith Guericke

0shares vested or exercised

0gifted (net of own trusts)

none reportedunvested awards, start → end

Includes unvested RSUs, amount not disclosed.
Additional holdings last reported more than 3 years ago are shown separately and excluded from totals.

Held through	Share class	Oct 8, 2025	Oct 8, 2026
Direct includes unvested RSUs, amount not disclosed	Common Stock	16,724	17,357

Additional holdings last reported Feb 12, 2009, not confirmed since: 7,684 shares. Not included in any total or percentage on this page.

Direct, Common Stock (By 401k): 7,684 shares, last reported Feb 12, 2009

Irving Lyons III

Includes unvested RSUs, amount not disclosed.

Director

9.8K

10K

no sales

Vesting, gifts, unvested awards and holding lines for Irving Lyons III

0shares vested or exercised

0gifted (net of own trusts)

none reportedunvested awards, start → end

Includes unvested RSUs, amount not disclosed.

Held through	Share class	Oct 8, 2025	Oct 8, 2026
Direct includes unvested RSUs, amount not disclosed	Common Stock	9,176	9,809
Trust	Common Stock	585	585

Barbara Pak

Includes unvested RSUs, amount not disclosed.

Executive Vice President & CFO

8.7K

12K

no sales

Vesting, gifts, unvested awards and holding lines for Barbara Pak

0shares vested or exercised

0gifted (net of own trusts)

−4.6Kwithheld by the company for taxes

none reportedunvested awards, start → end

Includes unvested RSUs, amount not disclosed.

Held through	Share class	Oct 8, 2025	Oct 8, 2026
Direct includes unvested RSUs, amount not disclosed	Common Stock	8,654	12,239

Stock options (not counted as shares):

Options held	Strike price	Expires	Intrinsic value (estimate)
3,158	$214.79	Dec 8, 2031	$204K

Estimate: options held × ($279.45 − strike price), using the most recent insider trade price on Form 4 (May 27, 2026), not a market close.

Amal Johnson

Includes unvested RSUs, amount not disclosed.

Director

3.7K

4.3K

no sales

Vesting, gifts, unvested awards and holding lines for Amal Johnson

0shares vested or exercised

0gifted (net of own trusts)

none reportedunvested awards, start → end

Includes unvested RSUs, amount not disclosed.

Held through	Share class	Oct 8, 2025	Oct 8, 2026
Direct includes unvested RSUs, amount not disclosed	Common Stock	3,191	3,824
Trust	Common Stock	500	500

John Arabia

Includes unvested RSUs, amount not disclosed.

Director

3.7K

4.3K

no sales

Vesting, gifts, unvested awards and holding lines for John Arabia

0shares vested or exercised

0gifted (net of own trusts)

none reportedunvested awards, start → end

Includes unvested RSUs, amount not disclosed.

Held through	Share class	Oct 8, 2025	Oct 8, 2026
Direct includes unvested RSUs, amount not disclosed	Common Stock	1,191	1,824
Trust	Common Stock	2,500	2,500

Anne Morrison

Includes unvested RSUs, amount not disclosed.

EVP, CAO & General Counsel

3.4K

6.9K

no sales

Vesting, gifts, unvested awards and holding lines for Anne Morrison

0shares vested or exercised

0gifted (net of own trusts)

−4Kwithheld by the company for taxes

none reportedunvested awards, start → end

Includes unvested RSUs, amount not disclosed.

Held through	Share class	Oct 8, 2025	Oct 8, 2026
Direct includes unvested RSUs, amount not disclosed	Common Stock	3,389	6,880

Stock options (not counted as shares):

Options held	Strike price	Expires	Intrinsic value (estimate)
2,571	$214.79	Dec 8, 2031	$166K

Estimate: options held × ($279.45 − strike price), using the most recent insider trade price on Form 4 (May 27, 2026), not a market close.

Maria Hawthorne

Includes unvested RSUs, amount not disclosed.

Director

3.1K

3.7K

no sales

Vesting, gifts, unvested awards and holding lines for Maria Hawthorne

0shares vested or exercised

0gifted (net of own trusts)

none reportedunvested awards, start → end

Includes unvested RSUs, amount not disclosed.

Held through	Share class	Oct 8, 2025	Oct 8, 2026
Direct includes unvested RSUs, amount not disclosed	Common Stock	3,078	3,711

Mary Kasaris

Includes unvested RSUs, amount not disclosed.

Director

2.8K

−600

2.8K

+1.2%

Vesting, gifts, unvested awards and holding lines for Mary Kasaris

0shares vested or exercised

0gifted (net of own trusts)

none reportedunvested awards, start → end

Includes unvested RSUs, amount not disclosed.

Held through	Share class	Oct 8, 2025	Oct 8, 2026
Direct includes unvested RSUs, amount not disclosed	Common Stock	2,361	2,394
Trust	Common Stock	450	450

Stock options (not counted as shares):

Options held	Strike price	Expires	Intrinsic value (estimate)
4,498	$216.31	May 9, 2033	$284K

Estimate: options held × ($279.45 − strike price), using the most recent insider trade price on Form 4 (May 27, 2026), not a market close.

Rylan Burns

Includes unvested RSUs, amount not disclosed.

EVP & Chief Investment Officer

2.6K

2.2K

no sales

Vesting, gifts, unvested awards and holding lines for Rylan Burns

0shares vested or exercised

0gifted (net of own trusts)

−379withheld by the company for taxes

none reportedunvested awards, start → end

Includes unvested RSUs, amount not disclosed.

Held through	Share class	Oct 8, 2025	Oct 8, 2026
Direct includes unvested RSUs, amount not disclosed	Common Stock	2,611	2,232

Stock options (not counted as shares):

Options held	Strike price	Expires	Intrinsic value (estimate)
1,289	$339.44	Nov 29, 2031	$0

Estimate: options held × ($279.45 − strike price), using the most recent insider trade price on Form 4 (May 27, 2026), not a market close.

Anne Gust

Minor difference of 6 shares. Difference is stated in footnotes (unreported vesting, exempt acquisition or transfer). Includes unvested RSUs, amount not disclosed.

Director

1.2K

1.8K

no sales

Vesting, gifts, unvested awards and holding lines for Anne Gust

0shares vested or exercised

0gifted (net of own trusts)

none reportedunvested awards, start → end

Includes unvested RSUs, amount not disclosed.

Held through	Share class	Oct 8, 2025	Oct 8, 2026
Direct includes unvested RSUs, amount not disclosed	Common Stock	1,191	1,830

Reconciliation: minor difference of 6 shares. Difference is stated in footnotes (unreported vesting, exempt acquisition or transfer).

Brennan McGreevy

Includes unvested RSUs, amount not disclosed.

GVP and CAO

827

715

no sales

Vesting, gifts, unvested awards and holding lines for Brennan McGreevy

0shares vested or exercised

0gifted (net of own trusts)

−112withheld by the company for taxes

none reportedunvested awards, start → end

Includes unvested RSUs, amount not disclosed.

Held through	Share class	Oct 8, 2025	Oct 8, 2026
Direct includes unvested RSUs, amount not disclosed	Common Stock	827	715

13 of 13 insiders fully reconciled: starting holdings plus reported transactions match ending holdings (12 exactly, 1 with a minor or footnoted difference). Percentages cover 12 of 13 officers and directors. Left out: George Marcus (most holdings were last confirmed in 2019). "Still held" compares ending with starting vested shares; a plus sign means the holding grew.

What explains the selling$168K of sales by plan status, purpose, seller and month

Officer and director open-market sales: $168K across 600 shares. Plan status and stated purpose are separate questions, and a sale can have both.

By plan status

No plan disclosed · $168K

Sales with no 10b5-1 plan and no tax reference in the filing. $168K of it is Mary Kasaris. No plan disclosed is a statement about the filing, not about why the sale happened. Largest such sale: Mary Kasaris, May 27, 2026

Taxes

22,130 shares ($5.7M) were withheld by the company for taxes, which isn't a market sale.

Charitable gifts · 2.5K shares

Gifts the filings describe as charitable. Gifts are not sales and are not included in the sale totals.

Seller	Shares sold	Proceeds	Under a disclosed plan	Share of total	Sales dates
Mary Kasaris Director	600	$168K	0%	100%	May 27, 2026 to May 27, 2026

Sales by month

Month	Sale proceeds	Disclosed plan	To cover taxes	No plan disclosed
Oct 2025	$0	$0	$0	$0
Nov 2025	$0	$0	$0	$0
Dec 2025	$0	$0	$0	$0
Jan 2026	$0	$0	$0	$0
Feb 2026	$0	$0	$0	$0
Mar 2026	$0	$0	$0	$0
Apr 2026	$0	$0	$0	$0
May 2026	$168K	$0	$0	$168K
Jun 2026	$0	$0	$0	$0
Jul 2026	$0	$0	$0	$0
Aug 2026	$0	$0	$0	$0
Sep 2026	$0	$0	$0	$0
Oct 2026	$0	$0	$0	$0

Is this normal? Selling year by year5 earlier years to compare with

Less than usual: less than one-twentieth of the 5-year average. 1 insider sold; the average is 4 a year.

12 months ending	Shares sold	Insiders who sold	Proceeds
Oct 8, 2026 Latest 12 months	600	1	$168K
Oct 8, 2025 1 year earlier	24K	5	$7.6M
Oct 8, 2024 2 years earlier	39K	6	$11.4M
Oct 9, 2023 3 years earlier	0	0	$0
Oct 9, 2022 4 years earlier	104K	7	$35.8M
Oct 9, 2021 5 years earlier	32K	3	$10.4M

Open-market sales (Form 4 code S) by people who were officers or directors, in split-adjusted shares. Earlier years include people who have since left. A sale that an outside holder also reports (a family trust, a fund) is counted with outside holders in every year. Shares, not dollars, are compared, so a change in the stock price doesn't look like a change in selling. Years the filings don't fully cover are shown but left out of the average.

Known gaps and uncertaintyEvery officer and director reconciles

Every officer and director reconciles for this period.

Anne Gust: minor difference of 6 shares. Difference is stated in footnotes (unreported vesting, exempt acquisition or transfer).

Inferred rename: "family trust" is treated as the same holder as "Trust", because the old name was never reported again and the new one opened with the same balance (500 shares). Old name, new name

Inferred rename: "family trust" is treated as the same holder as "Trust", because the old name was never reported again and the new one opened with the same balance (2,500 shares). Old name, new name

Inferred typo: the share class "Common Stock (By 401k)" is treated as the same class as "Common Stock(By 401k)" on 1 holding line, because the two spellings are nearly identical and each balance carried over exactly. Example (Michael Schall, 4,270 shares): old title, new title

Inferred typo: the share class "Common Stcok" is treated as the same class as "Common Stock" on 1 holding line, because the two spellings are nearly identical and each balance carried over exactly. Example (Erik Alexander, 555 shares): old title, new title

External context: we only cite outside events when a documented connection exists. None is shown for this period.

Sources and methodology769 filings from SEC EDGAR, and how we read them

All 769 Forms 3, 4 and 5 filed for Essex Property Trust (SEC CIK 920522) from Mar 30, 1998 to May 29, 2026, retrieved from SEC EDGAR on Oct 8, 2026. Prices are the ones reported in each filing, often weighted averages. 24 older filings exist only on paper and could not be read.

Holdings. Each holding line (a share class plus an owner, such as a trust or LLC) carries its last reported balance forward. Entities first reported during the period start at zero, so transfers between an insider's own trusts don't count as selling. Lines not reported for three years or more are listed separately and left out of totals.

Sales. A sale counts as under a 10b5-1 plan if its footnote cites one or the filing's Rule 10b5-1 box is checked, and as tax-related if its footnote cites tax obligations or sell-to-cover. Shares withheld by the company for taxes are listed separately. Sales with neither attribute are labeled "no plan disclosed".

Full methodology

Former or inactive filers (24)No filing in 18 months; last reported balances, not in any total

Name	Last filed	Last reported balance
Thomas Robinson	Mar 13, 2024	9,199 shares, last reported balance as of Mar 11, 2024
John Farias	Feb 9, 2024	3,321 shares, last reported balance as of Feb 8, 2024
Michael Schall	Dec 21, 2023	181,293 shares, last reported balance as of Dec 7, 2023
Byron Scordelis	May 11, 2023	3,642 shares, last reported balance as of May 9, 2023
Adam Berry	Dec 13, 2022	19,665 shares, last reported balance as of Jan 20, 2022
John Burkart	Mar 12, 2020	33,033 shares, last reported balance as of Mar 10, 2020
Craig Zimmerman	Nov 26, 2019	65,685 shares, last reported balance as of Nov 25, 2019
Janice Sears	Sep 23, 2019	1,781 shares, last reported balance as of Sep 20, 2019
John Eudy	Mar 27, 2019	50,409 shares, last reported balance as of Mar 26, 2019
Gary Martin	Feb 13, 2018	5,236 shares, last reported balance as of Feb 12, 2018
Issie Rabinovitch	May 18, 2017	65,431 shares, last reported balance as of May 16, 2017
David Brady	Mar 1, 2016	8,036 shares, last reported balance as of Feb 11, 2016
Thomas Sullivan	Dec 7, 2015	8,792 shares, last reported balance as of Dec 4, 2015
Erik Alexander	Aug 20, 2015	26,713 shares, last reported balance as of Aug 18, 2015
Michael Dance	Aug 12, 2015	26,330 shares, last reported balance as of Aug 11, 2015
Thomas Randlett	May 21, 2015	20,025 shares, last reported balance as of Jun 10, 2014
Claude Zinngrabe Jr.	May 21, 2015	673 shares, last reported balance as of May 16, 2013
Bryan Hunt	Aug 27, 2013	3,445 shares, last reported balance as of Aug 23, 2013
Willard Smith Jr.	May 18, 2011	20,970 shares, last reported balance as of May 16, 2011
Robert Larson	Dec 7, 2010	21,954 shares, last reported balance as of Dec 2, 2010
William Millichap	May 12, 2008	28,491 shares, last reported balance as of May 12, 2008
Robert Talbott	Aug 25, 2005	No balance on record
Mark Mikl	Nov 16, 2004	4,048 shares, last reported balance as of Nov 16, 2004
John Sachs	Oct 31, 2003	1,369,135 shares, last reported balance as of Oct 30, 2003

Essex Property Trust insiders sold $168K in the past 12 months. How much of their stake is that?

What stands out

Who sold, and how much of their stake

Selling by month

Common questions

Is the Essex Property Trust CEO selling stock?

Why are Essex Property Trust insiders selling?

Are any Essex Property Trust insiders buying?

How much of their stake did Essex Property Trust insiders sell?

The evidence

No plan disclosed · $168K

Taxes

Charitable gifts · 2.5K shares

Sales by month